Packing and method of making the same.



G. I. E. MASTIN & E. L. PERRY. PAOKING AND MET HOD OF MAKING THE SAMB.

APPLICATION FILED AUG. 23, 1909.

Patented Dec. 21, 1909.

WITNESSES l/vmlrogs, W

Afro/m r.

UNITED STATES PATENT oriuon CHARLES I. E. MASTIN, OF MIDLAND'PARK, ANDEDWARD L. PERRY, OF PATERS ON,

NEW JERSEY.

PACKING AND METHOD OF MAKING THE SAME.

Specification of Letters Patent. Patented Dec. 21, 1909.

Application filed August 23, 1909. Serial No. 514,088.

to the accompanying drawing,and to letters of reference marked thereon,which form a part of this specification.

Our invention relates to the manufacture of packings, and it has for itsobject to provide a'packing universally adapted for use in the manyinstances where it is necessary to prevent the escape of fluids betweenmachine parts or the like.

In carrying our invention into a practical form, we have had in mind toconstruct the packing so that it will effectually prevent, in a morepermanent way than packings heretofore devised, the passage of fluids,although the same may be under -great pressure and notwithstanding thefluids may possess deteriorating qualities and one of the parts packedmay be-a moving one and therefore calculated to produce considerablewear and tear on a body in the nature of a non-metallic packing.

We have illustrated our invention fully and clearly in the accompanyingdrawing, wherein,

Figure 1 is an isometric view of one form of the improved packing; Fig.2 is a perspective View of. another form of the improved packing; Fig. 3illustrates, in section, the two parts of the core of the packingseparated and before they are shaped preparatory to assembling; and,Fig. 4 illustrates the manner in which the assembled core-parts areassembled with their pliable reinforce or casing.

Generally. stated, in the preferred form shown, the improved packing isan attenuated somewhat yielding and elastic body having its two sidefaces substantially parallel and having a longitudinal substantiallywedge-shaped depression formed in what is the top thereof in Figs. 1 and2 of the drawing, the surface of said depression which ad- 7 joins oneside surface of the body forming therewith approximately an acute anglewhose apex is continuously lower than the remaining portion of saidbody; the packing may be sold in straight lengths, as shown in Fig.1,"in which case it is cut oil to the proper length by the user and thenbent into annular form to fit the annular space to be packed, or it maybe sold in the circular shape shown in Fig. 2.- hen the packing isplaced in the space to be packed, its lip (a in Fig. 1 and b in Fig. 2)lies in close contact with the surrounded or surrounding one of the twomachine parts which form the lateral walls of said space, and since saidlip, which is produced by the depression above referred to (c in Fig. land'd in Fig. 2), has its inner surface (6 in Fig. l and f in Fig.2).beveled to converge with the outer surface thereof, which iscontinuous with the side 9 in Fig. l (h, Fig. 2), the lip is held inclose contact with said part, or made to hug the same, by the pressureof the fluid and acts further to distribute uniformly-the lubricantwhere such is used, as Where one of the parts packed is a moving one.The portion 2' in Fig. l (j in Fig. 2), being higher than the lip, keepsthe edge of the latter free ofthe part impinged by the top surface ofthe packing, which part may be either the endwall of the space to bepacked or another packing; said portion 21 (or 7') is preferablybeveled, as shown, so as to form a more hermetic seal with the partagainst which it bears. To reduce the wear on the side 9 (or it) of thepacking, Babbitt metal studs are set therein, marked 70 in Fig. 1 and Zin'Fig. 2. v

We will now describe the improved packing with respect to its structureand the method of making the same, omitting reference particularly toFig. 2 for the meanwhile, since up to the point to be indicated laterthe packing there shown is identical to that shown in Fig. 1; we firstform two attenuated sections or parts m and a, each comprisingalternating layers of rubber compound 0 and duck or other pliable andtough material p held together by the adhesion of the rubber compoundand having (particularly the rubber layers) their edges exposed;

I viewed cross-sectionally, Fig. 3, the part at is higher than the part41.. The top of each is then removed from end to end thereof at I thebcvels indicated by the lines wand y.,

respectively, and the two parts placed in con tact with each other, theadhesion of the outer rubber layer of one holding them together; thesidesof the two parts which are thus brought into contact are theiradjacent sides in Fig. 3, so that the core 9 produced by their union hasthe attenuated depression 7 formed therein. The core 9 thus produced isthen inserted into a tubular duck or other tough, pliable envelop orcasing s, the material of which is substantially non-stretching; thecircumferential dimension of said casing is internally substantiallyequal to the circumferential surface dimension of said core so that atfirst a longitudinally extending portion 6, Fig. 4, will remain standingsomewhat loose or free. Said-core 9, enveloped in the casing, is nowintroduced into the moldu with its depression toward the mold, whereuponthe plunger 'v is made to descend and force the fabric-enveloped coreinto the mold, the effect ofwhich is to cause the casing tofit snuglyevery part of said core; inasmuch as the outer layers of the core 9areof rubber, the casing adheres closely to the same and also to thefaces of said core comprisin the exposed edges of the rubber layers. Tereupon, and while the enveloped core q is yet in the mold and underpressure, the packing is cured or vulcanized. The resultant product is abody having a yielding core held more or less in a state of compressionby the casing s; the yielding and elastic qualities of such body depend,of course, upon the relative thicknesses of the rubber and duck layersof its core and the degree of compression under which the core is heldby the casing. Subsequently, holes may be formed in the acking and theBabbitt-metal plugs or stu s introduced therein.

Up to the point of forming the .core by placing the attenuated partseach comprising alternating layers of rubber compound and duck or thelike in adhering contact with each other, the packing shown in Fig. 2 isproduced in the same manner as that shown in Fi 1. Therenpon the core 10is introduced into the casing :12 and the whole bent into circular form,the two ends of the core being lapped or otherwise jointed and adheringand the ends of the asing being lapped by inserting one within theother, as indicated at 3 in Fig. 2, the casing being a little longerthan the core to permit this; the lap formed by the ends of the casingis prferably'removed from the joint formed between the ends of the core,as shown, so as to prevent any undue enlargement. In this case, thecasing is loose or free initially, the same {as the casing shown in Fig.4. The enveloped core is now introduced into a mold shaped.cross-sectionally the same as the mold in Fig. 4, pressure brought tobear upon 1t to cause its casing to assume a sung fitting relation to itand to adhere thereto at substantially all parts of its surfaces, andthen cured or vulcanized while under pressurein the mold.

The enveloping casing since it adheres 7g firmly to the core and holdsthe same under more or less compression, prevents the breaking downthereof, by the separation of its component parts or otherwise, as bythe separation of the layers forming its lip or of the sections m and nof the core; it also acts toprevent the lip from turning or curling overunder the frictional action of a moving part with which it may lie incontact.

Having thus fully described our invention, what we claim and desire tosecure by Letters Patent'is:

' 1. As an article of manufacture, a packing for joints comprisingalternating layers of rubber compoundand tough pliable ma, terialsecured together by the adhesion of the rubber compound, the edges ofsaid layers together forming substantially plane surfaces, substantiallyas described.

2. As an article of manufacture, a packing for joints consisting of acore, comprising alternating layers of rubber compound and tough pliablematerial secured together by the adhesion of the rubber compound, theedges ofsaid layers together forming substantially plane surfaces, and acasings lying in adhering contact with the outer face of an exposed oroutermost layer and with edges of said layers forming one .of said planesurfaces, substantially as de scribed.

3. As an article of manufacture, a packing forjoints consisting of acore comprising alternatinglayers of rubber compound and tough pliablematerial'secured together by the adhesion of the rubber compound, theedges of said layers together forming substantially plane surfaces, anda casing closely enveloping said core and adhering. to the ex osedsurfaces thereof, substantially as descri ed.

4. As an article of manufacture, a pack- ,ing for joints comprising ayielding core having an elongated lip formed substantially wedge-shapedin cross-section and a reinforcing casing lying in covering relation toall of the exposed surfaces of said lip and adhering to both surfacesthereof, substantially continuously of the latter, substantially asdescribed.

5; As an article of manufacture, a packing for joints comprising ayielding core having an elongated lip formed substantially wedge-shaped1ncross-section and forming in said core a longitudinal depression, anda reinforcing casing lying .in enveloping relation to the core andadhering to substantially all portions of the surfaces of said core,substantially as described 6. As an article of manufacture, a' pack ingfor joints comprising a core formed of alternated layers of rubbercompound and tough pliable material and having a longitudinal lip formedsubstantially wedgeshaped in cross section, one surface of said lipincluding the edges of several of said layers, and a reinforcing casinglying in covering relation and secured by the adhesion of the rubbercompound to said surface of the lip in substantially all portionsthereof, substantially as described.

7. As an article of manufacture, a packing for joints comprising a coreitself comprising two sections lying with the face of one in contactwith a face of the other and one being beveled on the side thereofadjoining the other and thereby'forming a depression between saidsections, and a reinforcing easing lying in covering relation and adher-0 mg to the surfaces of said depression, substantially as described.

8. As an article of manufacture, a packing for joints comprising anelongated core having a longitudinal depression therein, and areinforcing casing enveloping said core tially equaling thecircumferential dimen-' sion of the core, pressing the reinforce intothe depression of the core until the reinforce is brought into fittingrelation to substantially all portions'of the longitudinal. surfaces ofthe core and simultaneously causing .the reinforce to adhere to thecore, and

finally vulcanizing the article thus formed, substantially as described.

In testimony whereof, we have hereunto set our hands this th day ofAugust, 1909.

C. I. E. MASTIN. E. L. PERRY.

Witnesses:

JOHN W. STEWARD, WM. D. BELL.

